Makefile: summarize systems with the same CPPFLAGS and LDFLAGS

Change-Id: I067430e52eb41bf0af4f08246bbe59117bc09bdb
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/58247
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72239
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed